Hydraulic variable-speed-transmission device.



J. 0. MESSICK. I

HYDRAULIC VARIABLE SPEED TRANSMISSION DEVICE.

APPLICATION FILED JUNE 30. 1913.

1,1 1 9,976, Patented Dec. 8, 1914.

UNITED STATES PATENT OFFICE.

JOHN C. MESSICK, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO JULES A. ZIMMERLIN, OF SAN FRANCISCO, CALIFORNIA.v

-HYDRAULIC VARIABLE-SPEED-TRANSMISSION DEVICE.

To all whom it may concern: 7 p

I'K. it known that I, Jens C.-Mr;ssrcr a citizen of the United States; residing in the city and county of San lfrancisco and State v of California, have invented new and useful- .Varia-ble-.

valve and valve operating-means for controlling'the relative speeds of the driven and driving parts through the medium of ning fit therefor.

the fluid.

The invention consists of the parts and the construction and combination of parts as hereinafter 'more fully described and claimed having reference to the aecom panying drawings in which- Figure l is a longitudinal vertical section partly in elevation of the device. Fig. 2 is a section on line XX, Fig. l, looking'to;

wardthe driving disk. Fig. 3 is a side ele ration of one of the valves.

This transmission device consists of a driving shaft 2, having a body portion 2 of suitable length and diameter, upon which is keyed or otherwise securely fastened a disk 4 rotatahly fitting a casing. loose on the shaft 3efid having a substantially ovah shapt'ad famber forming at opposite faces of the dis-k4 substantially crescent-shaped pockets 6. The minor diameter of the ovalshaped chamber is substantially equal to the diameter of the disk 4 but provides a run The opposite pockets fifi are to be filled with a fluid, indicated at 7', and in the piston 1 there are formed radial equidistant slots 7 of suitable proportions in which are radially movable valves or abutment members 8. The valves 8 are normally projected outwardly by respective springs 9 reacting bet een the innerends ofthe valves and the bottoms of --the slots 7. If the Specification of Letters Patent.

Patented Dec. 8,1914.

Application filed June 30, 1913. Serial No 776,540.

valves 8 were-allowed to constantly project outwardly into bearing contact with the surface 'of the ehamber'wof the, casing aith- 1;

the confined fluid in the pockets 6, byrea;

ahutn'ient faces thereof would press against-1 son of the rotation of the disk L, and confine.

the fluid in front of the valve 8 in its-re spective pocket 6, and thereby the resistg ance of the fluid under pressure of the l-v valves 8 would cause the casing 5 to -revolve;-

equal to the speed of rotation of the pisa ton 4. i

' with the disk 4 at ja speedsubstantially One of the important objeets of thet-inventiorr is to be able to so, position the valves 45, with relation to the piston 4' and the inner wall of the'cha'mber of the casing that the liquid in the pockets mayescape,

from in front of the valves 8' over the ends thereof into the pocket. portions on--the rear side of the moving valves 8;; The rapidity with \vhich'the liquid in thepoekets ca change its respective positions from infront,

of the valves to the rear of the calves de-I termines the relative spe'eds'of the driving member 4 and" the frictionallydriven-mem her 7. For the purpose of controlling therefore, the radial positions of the several valves 8, with relation to the disk 4, the. valves are each longitudinally chambered, as at 10, to receive a plunger l'1 having .ahead 12 adapted to engage a seat 13 in the bottom of the chamber 10; each plunger being attached to the outer end of a respec the wire or cable H which passes cent-rally through the projecting springs through the passageway l'5 formed for its reception in the central portion of the 'disk 4. The cables ll 'iass around respective. guide rollers lfi journaled in radial slots l7 of the shaft body l, and over which rollers,

the cables 1-! are directed longitudinally toward abutton 18 in which they are seurely attached.

The button 18 is mounted in a cup or socket 19 which is centrally and movably supported in a longitudinal chamber 20 of the shaft body 5 in which chamber there is inovahlvsupported a shifter or spindle2l to which the socket'lil is turnablv secured by 9 and a screw or other appropriate connection 22.

The socket If) is provided for longitudinal movement with relation to the shaft. body 3, and prevented from circumferential movement thereto'by a stop screw 23 projecting radially from the socket 19, and

which also serves as a means for holding the removable button 18 in the socket.

When it is desired to change the position, radially, of the valves. 8 of the disk 4, the operator simply shifts the shiftable spindle 21V axially by means of; a lever 24 or other appropriate device, thus pulling on the socket 19' and drawing or releasing the cables 14, which are turnably connected to the spindle '21, and consequentlyipermits shifting of the plunger 11. the shifter 21 be moved inwardly, then the springs 9 force the. valves 8 outward y take/'11P th driving member and adriven' member which 'incloses'the driving member, spring pressed slack of the cables 14 by forcing the valves against the heads 12 'offfthe 'plun gers11 which will be held in a predetermined position under control of the lever or' other shifter 24. If it be desired to retract the valves 8, then the operator throws thelever 24 to partly withdraw the shifting device 21 and pull the cables 14: downwardly, thus bringing the plungers 11 into engagement with theirrespective seats 13 of the valves and drawing the latter inwardly the desired distance. 'In case'the valves are fully re "tracted, then the disk 4 would rotate freely within the chamber of the casing 5, and

since the valves 8 would be so far receded as to not act resistively upon the liquid in the pockets 6 there would be no 'motion transmitted to the driven member 5, which of itself -.may be utilized as a pulley or provided for attaching a gear or power transmitting device 5'.

Any suitable means may be utilized to attach the cables 14 tojtheir respective plun gets '11, and in the present instance there are provided screws 11 which arethreaded the valves 8.

in the bodies of the plungers or controllers 1 1,fthe screws 11 moving in the slots 8 formed for their reception in one side of In order to prevent leak of thefruid in the pockets 6,when subjected to pressure of the valves 8, there are provided suitable packing glands 25 at the several running joints at which leak would be likely to occur.

Having thus described my inventionfwhat 'I-claim and desire to secure by Letters Patton being arranged in said socket member, a stop screw projected through{ the socket membenand having one end engaged with the button to hold same within the socket and having its opposite end projecting outwardly beyond the socket member and slid ably arranged in a longitudinal 'slot provided therefor in the shaft, a member connected to said socket member and being slidable in said chamber and extending beyond an end of the shaft, and means to slide said element. t

2. In a power transmitting mechanism, a

valves carried by the driving member, a shaft on which'said-members are mounted, said shaft having alongitudinal chamber extending through onefcnd thereof and also having radial slots which communicate with the chamber, a member slidable in said chamber and having one end thereof projecting beyond said. end of the shaft, means connected to said projecting end of said member to move same along the length of the chamber, and cables connected to said.

valves and being passed through the slots and connected to said member. v

3. In a power transmitting mechanism, a driving member and a driven member which incloses the driving member, spring pressed valves carried by the driving member, a. shaft on which said members are mounted, said shaft havinga longitudinal chamber extending through one end thereof and also having radial slots which communicate with the chamber, a member slidable in said chamber and having one end thereof'pro jecting beyond said end of the shaft, means {'05 connected to said projecting end of said member to move same along the length of the chamber, cables connected to said valves and being passed through the slots and connected to said member, and means on said member projecting outwardly from the periphery thereof and slidably extending into a longitudinalslot provided therefor in the shaft for holding the member against turning movement,

4. In a power transmitting mechanism, a driving member and a driven member which incloses the driving member, spring pressed valves carried by the driving member, a

shaft on which said members are mounted, said shaft having a longitudinal chamber and radial slots that communicate with the chamber, a socket member slidable in said chamber, cables connected to the valves and being passed through the slots, means con-" necting. the inner ends of the cables disposed in said socket, and combined meansto hold the member against rotation relative to the shaft and to engage said cable connecting means to hold the latter in said socket.

shaft on 5. In a power transmitting mechanism, 'a driving member and a driven member which :ncleses the driving member, spring pressed valves carried by the driving member, a which said members are mounted, said shaft having a longitudinal chamber and radial lots that communicate with the ehember, a member slidable in said chamber, each valve having a longitudinal chamber formed. with a seat intermediate the charm her ends, a plunger in each chamber having 51 head which engages said seat and having ts inner end extending beyond the inner end of the valve, cables passed through the plunger-s and being secured to the latter and being passed through the slots, means connecting the inner ends of the cables to the member, and means to slide the member in said chamber.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN C. MESSICK. Vv' itnesses Jenn H. Hsname, W. W. HEALEY. 

